Hardware and performance

Issues related to computer hardware and Moodle's performance under load.

Documentation: Performance and Performance FAQ
Forum moderator: Howard Miller

Read this first!

This forum is for discussing issues related to computer hardware for Moodle, as well as comparing notes on Moodle's performance under load. Advice on finding an internet hosting service also belongs here.

Before posting your question here please read the documentation Performance and and Performance FAQ.

Many of the questions have already been answered. Please make use of the Advanced forum search and the Google custom search to find them.

If your questions still remain unanswered, post them here. Include as much background information as possible about your hardware - operating system, web server, database server, PHP scripting framework, etc. If your machine is virtualized, also mention the host hardware, operating system, virtualization technology used and resources assigned to the virtual machine. If you use a hosting service, mention either the hosting provider and the package or resources as advertised.

For general advice on how to ask questions, refer to the Moodle.org forums help. Also please observe our site policy.

Best wishes,
your moderator Howard.

Showing 100 of 2672 discussions
  Discussion Started by Replies Last post Created  
Ghostscript test failing when database on an external server
Picture of Oliver Boyers Oliver Boyers
1 Fri, Oct 18, 2019, 9:30 AM
AWS and EFS page load
Picture of Raimundo Farrapo Raimundo Farrapo
3 Thu, Oct 17, 2019, 7:06 PM
High DB Connections [State sleep]
Picture of Christos Savva Christos Savva
4 Tue, Oct 15, 2019, 2:10 PM
database is overloaded
Picture of Abu Ali Abu Ali
4 Mon, Oct 14, 2019, 7:44 PM
Please share your task processing settings!
Picture of Howard Miller Howard Miller
11 Thu, Oct 10, 2019, 7:51 PM
Windows Server 2016, IIS10, MSSQL 2016, PHP7.0 with Moodle 3.6.2+
Picture of Craig Gardner Craig Gardner
6 Tue, Sep 24, 2019, 11:07 PM
Quizzes Loads Slow - Other functions working fine
Picture of Shelly Vaughan Shelly Vaughan
5 Tue, Aug 27, 2019, 2:54 AM
Audio player of audio file doesn't load.
Picture of Russell Thomson Russell Thomson
0 Thu, Oct 3, 2019, 4:49 PM
Moodle Caching Config screen
Picture of Doneld Anderson Doneld Anderson
1 Wed, Sep 25, 2019, 1:44 AM
requirments for moodle server
Picture of Mike Kruk Mike Kruk
5 Tue, Sep 24, 2019, 4:59 PM
Diagnosing issue with Moodle caching
Picture of Alistair Spark Alistair Spark
24 Fri, Aug 9, 2019, 11:06 PM
Moodle 3.7 Quiz for 15000 concurrent users via Mobile App? Is it possible?
Picture of Sathiya Priya Sathiya Priya
16 Thu, Sep 19, 2019, 10:24 PM
[Moodle BenchMark] Need Beta-tester
Picture of Mickaël PANNEQUIN Mickaël PANNEQUIN
101 Sun, Jun 26, 2016, 9:51 PM
Replicatring the 'Plugins Overview' page via SQL Configurable Reports block.
Picture of VoltarMendoza VoltarMendoza VoltarMendoza VoltarMendoza
0 Sat, Sep 21, 2019, 7:13 AM
installed moodle 3.4.1 and it is slow.
Picture of TokiyoRio TokiyoRio TokiyoRio TokiyoRio
3 Wed, Sep 18, 2019, 3:29 PM
Unable to access "New Event" moodle calendar in IE browser.
Picture of priya a priya a
5 Fri, Sep 13, 2019, 11:23 AM
I/O File Performance
Picture of Coco E. Coco E.
10 Thu, Aug 29, 2019, 8:34 PM
Hardware /performance suggestion
Picture of Nije Bitno Nije Bitno
12 Fri, Sep 13, 2019, 5:21 AM
Help! Database server CPU maxed out
Picture of Ben Kahn Ben Kahn
14 Tue, Aug 27, 2019, 7:04 AM
Recommendation of SQLTunner
Picture of Abu Ali Abu Ali
2 Wed, Sep 4, 2019, 7:15 PM
One node seems to behave worse than others.
Picture of Ángel Orosa Ángel Orosa
4 Mon, Sep 2, 2019, 8:10 PM
Cache store performance reporting
Picture of Andrey Kladiti Andrey Kladiti
4 Mon, Jul 22, 2019, 2:55 AM
optimize performance
Picture of solmaz naderi solmaz naderi
6 Tue, Oct 2, 2018, 4:30 PM
Server load testing
Picture of Abu Ali Abu Ali
2 Thu, Aug 29, 2019, 1:09 AM
Anybody using a load balancer?
Picture of Howard Miller Howard Miller
7 Mon, Aug 19, 2019, 7:42 PM
Redis caching and unix socket configuration
Picture of Alain Raap Alain Raap
14 Mon, Aug 5, 2019, 6:00 PM
Extending browser cache
Picture of Benjamin Bøndergaard Benjamin Bøndergaard
3 Tue, Aug 13, 2019, 4:13 PM
Moodle REALLY slow with 20 concurrent users
Picture of Oliver Boyers Oliver Boyers
12 Wed, Aug 7, 2019, 11:55 PM
Php memory_limit, what is the good way
Picture of Aurélien Besson Aurélien Besson
5 Tue, Nov 6, 2018, 4:49 AM
Bad RAM-use performance from get_records [MDL-66327]
Picture of Tim Hunt Tim Hunt
1 Tue, Aug 6, 2019, 12:50 AM
Certain pages loading very slow
Picture of Albert R. Albert R.
3 Tue, Apr 9, 2019, 7:57 AM
Effect of Debian Buster (PHP 7.3) on Moodle performance?
Picture of Visvanath Ratnaweera Visvanath Ratnaweera
0 Tue, Aug 6, 2019, 12:10 AM
Moodle Architecture Calculator
Picture of Noveck Gowandan Noveck Gowandan
13 Fri, Jul 26, 2019, 9:23 AM
External log store and performance
Picture of Mark van Hoek Mark van Hoek
2 Wed, Jul 31, 2019, 3:26 AM
Very Slow Site after migrating to a VPS
Picture of Leah Lever Leah Lever
2 Tue, Jul 16, 2019, 6:51 PM
Minimum Server Requirements
Picture of Manu Krishna Manu Krishna
3 Thu, Jul 11, 2019, 2:59 PM
How do i make site online/public?
Picture of Marg Smith Marg Smith
5 Wed, Jul 10, 2019, 3:10 PM
Recent experiences with GlusterFS?
Picture of Noveck Gowandan Noveck Gowandan
1 Thu, Jun 6, 2019, 10:45 PM
Too many opened sessions on Moodle 2.7.20
Picture of Cristian Santibañez Cristian Santibañez
2 Wed, Jul 3, 2019, 12:38 AM
Too many files problem
Picture of Steve Massicotte Steve Massicotte
11 Thu, Jun 20, 2019, 8:53 PM
Slow Moodle in Thin Clients
Picture of Alec Jordan Buencamino Alec Jordan Buencamino
0 Mon, Jun 24, 2019, 10:41 PM
Moodle scalability
Picture of Thinh Dang Thinh Dang
3 Sat, Jun 15, 2019, 9:24 PM
Memcached store instance disappears after days
Picture of Ryan Chan Ryan Chan
1 Thu, Jun 20, 2019, 10:46 AM
How to stress test Moodle?
Picture of Mario Gharib Mario Gharib
4 Mon, Jun 17, 2019, 2:57 AM
Updating Browsers and OS for better Moodle performance
Picture of Mario Gharib Mario Gharib
1 Mon, Jun 17, 2019, 2:56 AM
Redis and stunnel
Picture of Mark Johnson Mark Johnson
0 Fri, Jun 14, 2019, 10:41 PM
General performance question
Picture of Heinz Felfe Heinz Felfe
15 Wed, Jun 5, 2019, 10:13 PM
Moodle + AWS EFS + filecachesd is it recommended?
Picture of Christos Savva Christos Savva
2 Tue, Apr 2, 2019, 6:23 PM
Moodledocs: Summary of cache lock instances
Picture of Luis de Vasconcelos Luis de Vasconcelos
3 Wed, May 22, 2019, 4:44 PM
Simple global search
Picture of Michelle Melton Michelle Melton
0 Tue, May 28, 2019, 8:05 PM
Globally distributed installation
Picture of Simon Lewis Simon Lewis
10 Wed, May 22, 2019, 10:45 PM
Tuning FCGI and Apache for Moodle
Picture of Stephen Bourget Stephen Bourget
11 Sat, May 18, 2019, 12:08 AM
configuring redis and APCu
Picture of stefan weber stefan weber
3 Thu, Apr 18, 2019, 7:36 PM
Admin Pages Slow (10-20 sec page loads)
Picture of Tom Palaz Tom Palaz
5 Tue, May 14, 2019, 5:17 AM
Sudden Proxy Error, no recent system changes
Picture of Tiffany Morgan Tiffany Morgan
8 Tue, May 14, 2019, 4:49 AM
Moodle file picker not working
Picture of Taj Des Taj Des
27 Thu, Mar 30, 2017, 7:58 PM
Off-boarding ClamAV from web nodes?
Picture of Jeff White Jeff White
14 Wed, Feb 20, 2019, 2:50 AM
PHP errors Moodle 3.4.5, PHP 7.1.27, MySQL 5.7.23.23
Picture of Barbara Taylor Barbara Taylor
9 Wed, May 1, 2019, 4:41 AM
Redis Cache Lock Issue
Picture of Eric Katchan Eric Katchan
2 Thu, May 2, 2019, 8:19 PM
Caching & Application Cache in Cluster
Picture of Saad Zaman Saad Zaman
15 Mon, Apr 22, 2019, 7:44 PM
Moodle 3.4.2 Performance
Picture of sheikh usman sheikh usman
2 Tue, Apr 30, 2019, 6:20 PM
Redis cache store instance
Picture of Luis de Vasconcelos Luis de Vasconcelos
1 Tue, Apr 23, 2019, 11:30 PM
Performance with 2500 concurrent users
Picture of Stephen Tod Stephen Tod
5 Thu, Apr 18, 2019, 1:54 AM
Slow from University server
Picture of Scott Bingham Scott Bingham
1 Wed, Apr 17, 2019, 6:57 AM
Slowest queries are inserting single row into mdl_sessions
Picture of Diane Soini Diane Soini
14 Tue, Apr 9, 2019, 8:00 AM
External database log - will it copy existing?
Picture of Diane Soini Diane Soini
2 Mon, Apr 15, 2019, 11:23 PM
Moodle performance issues with mysql
Picture of Sreepathy T L Sreepathy T L
6 Sun, Mar 10, 2019, 8:19 PM
Flushing all the caches causes a fatal error
Picture of Service Usagers du Numérique Service Usagers du Numérique
2 Fri, Apr 12, 2019, 8:55 PM
Users bounced off the server?
Picture of heli g heli g
2 Fri, Apr 12, 2019, 9:43 PM
Cluster setup Help
Picture of Simon Powell Simon Powell
19 Fri, Mar 22, 2019, 7:18 PM
What Size Should ramdisk/tmpfs Be for 'temp' and 'cache' ?
Picture of Paul L Paul L
11 Tue, Mar 5, 2019, 1:49 AM
Moodle Performance Issue with 4 users
Picture of Paul Young Paul Young
22 Fri, Mar 15, 2019, 12:28 AM
XAMPP on Windows Server 2012 running in production
Picture of Michael Hankins Michael Hankins
19 Sat, Mar 9, 2019, 3:09 PM
Can anyone share a performant Redis cache configuration?
Picture of wz z wz z
2 Wed, Mar 13, 2019, 5:07 PM
Data Privacy and Large Moodles
Picture of David Dixon David Dixon
2 Fri, Mar 8, 2019, 6:11 PM
10K Users - 2 hours Exam
Picture of uk nites uk nites
2 Sun, Mar 10, 2019, 8:24 PM
Using config.php for configuration management -> performance impact?
Picture of Alistair Spark Alistair Spark
6 Fri, Jan 11, 2019, 7:24 PM
The right Database to use
Picture of Hal MacLean Hal MacLean
10 Tue, Feb 26, 2019, 6:28 PM
JMeter Moodle Test
Picture of Richard Brown Richard Brown
0 Tue, Feb 26, 2019, 11:15 PM
Web Access of moodle console is slow & www-root consuming 100% CPU Utilization.
Picture of Mohd Hassan Uddin Mohd Hassan Uddin
0 Mon, Feb 25, 2019, 4:46 PM
Apache CPU High Usage when opening tasks
Picture of Marc Celeiro Marc Celeiro
21 Thu, Jan 17, 2019, 3:50 AM
Moodle creating Excessive I/Os
Picture of Greg Merriman Greg Merriman
3 Thu, Feb 21, 2019, 10:13 PM
moodle in azure
Picture of MARIA CENTENO MARIA CENTENO
7 Tue, Feb 19, 2019, 3:26 AM
performance with mysqltuner
Picture of mimi nom mimi nom
2 Tue, Feb 19, 2019, 5:19 PM
Error communicating with server
Picture of Randy Foster Randy Foster
0 Tue, Feb 19, 2019, 11:10 AM
NFS for dataroot
Picture of Keith Weinheimer Keith Weinheimer
13 Fri, Dec 7, 2018, 2:13 AM
Overriding server timeout parameter can create chaos
Picture of Pierre Raynaud Pierre Raynaud
3 Tue, Feb 12, 2019, 7:48 PM
Moodle deployment on cloud recommended specifications
Picture of Pushpendra Vishal Kaushal Pushpendra Vishal Kaushal
1 Wed, Feb 13, 2019, 5:35 PM
Moodle crashing with "Too many open files"
Picture of Debbie Unterseher Debbie Unterseher
2 Thu, Feb 7, 2019, 2:05 AM
Exclude webservice user from Moodle logs
Picture of Richard van Iwaarden Richard van Iwaarden
0 Thu, Feb 7, 2019, 11:52 PM
Email sent via email_to_user() needs to be queued for background sending
Picture of Chris Yust Chris Yust
7 Sat, Feb 2, 2019, 1:43 AM
Moodle System Requirements for 500 Active Concurrent User
Picture of Daoud El Gharib Daoud El Gharib
6 Mon, Jan 28, 2019, 10:56 PM
Moodle 3.4 performance is very Low
Picture of Daoud El Gharib Daoud El Gharib
19 Sun, May 20, 2018, 4:14 AM
Student upload issues only on certain network
Picture of Jessica Dawson Jessica Dawson
7 Thu, Jan 24, 2019, 9:40 PM
Timeouts during an exam
Picture of Danishka Navin Danishka Navin
13 Sat, Jan 12, 2019, 2:59 PM
Moodle server resources for 1000+ users
Picture of Redzy Red Redzy Red
5 Wed, Jan 16, 2019, 4:42 PM
Slow backup and restore of small quizes where there's a lot of question in course
Picture of Yedidia Klein Yedidia Klein
1 Thu, Dec 13, 2018, 1:40 AM
Requirement for Migrating My Moodle School
Picture of Arnold Yu Arnold Yu
12 Mon, Dec 10, 2018, 12:45 PM
Can Redis Shared Application cache run on local nodes?
Picture of Jan Derriks Jan Derriks
5 Sat, Nov 10, 2018, 6:58 PM
'core_renderer' is taking most of time while loading a page
Picture of Abdul Ghaffar Abdul Ghaffar
7 Thu, Oct 11, 2018, 7:40 PM